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I am looking for an experienced mobile app developer to help fix a series of specific, targeted bugs or minor troubleshooting issues in our existing mobile apps. This project does not involve building a new app or undertaking a major redesign; it focuses on addressing small but critical issues that impact app performance and usability. The project is perfect for developers who have experience with mobile app development, can troubleshoot and resolve bugs quickly, and have the ability to work within existing codebases. Scope of Work: Here are examples of the types of tasks we need help with. The exact details will be shared after discussing the project in more detail: -Bug Fixes: > Resolve crashes, freezes, or error messages that appear on specific screens. > Fix UI glitches, such as layout issues, unresponsive buttons, or text cut-off on certain devices. > Troubleshoot login/authentication issues or failing API calls where data isn't loading as expected. > Minor feature adjustments, such as changing the notification behavior, fixing form validation, or resolving small logic bugs. > Address issues that may have caused store rejections. > General debugging and testing of apps on real devices (simulators/emulators for initial work). - Required Skills & Experience: To be considered for this project, you should meet the following requirements: > Proven experience developing mobile apps for iOS (Swift/Objective-C), Android (Kotlin/Java), or using cross-platform frameworks such as Flutter or React Native. > Strong ability to work with and troubleshoot existing codebases > Familiarity with key debugging tools like Xcode, Android Studio, Chrome DevTools, Firebase Crashlytics, and others. > Strong communication skills, with the ability to clearly explain what was fixed and how you resolved the issues. > Bonus (but not required): Experience in submitting app updates to App Store or Google Play. Availability: ASAP preferred. Please let me know your availability to start. I look forward to working with a reliable, fast developer to get these issues resolved efficiently. Thank you for your time!
Mã dự án: 40287476
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⭐⭐⭐⭐⭐Hello, I’m a mobile developer with strong experience in iOS, Android, and React Native apps, focusing on debugging and performance fixes in existing codebases. I can quickly identify and resolve crashes, UI glitches, API failures, and authentication issues using tools like Xcode, Android Studio, and Firebase Crashlytics. I regularly work on production apps where stability, store compliance, and clear bug documentation are essential. Could you share which framework your apps use (native or React Native) and whether the crash reports are already tracked in Crashlytics or another monitoring tool? Also, are the issues reproducible on specific devices or OS versions? I am confident I can diagnose and fix these issues efficiently while keeping your app stable and ready for store updates. Best.
$50 USD trong 7 ngày
1,4
1,4
170 freelancer chào giá trung bình $151 USD cho công việc này

As a seasoned developer with over 9 years of experience specializing in Java, I bring a level of expertise and professionalism that your project demands. Throughout my career, I have not only developed robust applications, but also have significant experience in troubleshooting and debugging. This entails working skillfully within existing codebases to resolve issues while ensuring stability and performance. Hence, it is safe to say that fixing the specific bugs and minor troubleshooting tasks you need assistance with are well within my wheelhouse. I also have comprehensive knowledge of the key debugging tools listed in your project description - Xcode, Android Studio, Chrome DevTools, Firebase Crashlytics. Noting your preference for a fast and reliable developer, I can guarantee you quick turnaround times without compromising the quality of my work. I am adept at clearly communicating my progress, including detailing what has been fixed and how the issue was resolved. An additional advantage I bring to the table is my prior experience submitting app updates to both App Store and Google Play. This means I won't only be well acquainted with the strict guidelines governing these platforms but will also be able to rectify any previous issues which had caused store rejections. If chosen for this project, I assure you that you'll be getting a highly skilled professional who will deliver quality results efficiently and on time!
$140 USD trong 2 ngày
7,2
7,2

Hi. As React Native Expert, I am very interested in your project. I am very familiar with Android Studio and Xcode. I have mobile and backend skills with 8+ years. I wish to work for you. Thanks for attention.
$50 USD trong 1 ngày
7,3
7,3

Hello, I'm Ahtesham, and I’d be glad to help bring stability and precision back to your mobile apps. Your focus on targeted bug fixes aligns perfectly with my expertise across iOS, Android, and cross‑platform frameworks. I specialize in resolving crashes, UI glitches, broken API calls, and subtle logic issues without disrupting the existing structure of your app. With hands‑on experience using tools like Xcode, Android Studio, Crashlytics, and DevTools, I can quickly diagnose and resolve issues impacting usability and store approvals. My approach is fast, clear, and detail‑oriented, ensuring each fix is both efficient and well‑documented. I'm ready to jump in ASAP and help streamline performance so your users get the smooth experience they expect. Looking forward to working with you.
$180 USD trong 5 ngày
7,1
7,1

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards! Divya
$250 USD trong 7 ngày
6,7
6,7

Hi, I'll fix crashes, UI glitches, API failures and store rejections across native Android (Kotlin/Java) and iOS (Swift) using Android Studio, Xcode and Firebase Crashlytics. I can start immediately and work through your bug list fast with clear explanations of every fix. Send me the details and I'll get started. Thanks!
$250 USD trong 2 ngày
6,6
6,6

Hi, It will be an honor for me to work with you. I have got 12 years of mobile application development experience (iOS, android and flutter). Lets discuss this in detail and get this started. Looking forward to hear from you.
$200 USD trong 3 ngày
6,9
6,9

Hello, As an experienced mobile app developer, I would be a great fit for your bug-fixing and troubleshooting needs. My team and I at Our Software are not only leaders in providing diverse web services but are also experts in mobile app development, making us well-versed in managing existing codebases and resolving bugs promptly and accurately. We have extensive hands-on experience with the core tools -form Xcode to Android Studio to Chrome DevTools and Firebase Crashlytics- that are instrumental in debugging and fixing issues effectively. At Our Software, we've produced impressive apps using various technologies like Swift, Objective-C, Kotlin, Java, Flutter, and React Native. This proficiency enables us to adapt to any codebase effortlessly. Moreover, communication is at the heart of our process - we always provide detailed explanations on how we fixed the bugs/tweaks/adjustments done so you can understand every step we took. With prompt availability, commitment to excellence, and customer service-oriented approach, working with us promises not just efficient issue resolution but also a transformative partnership that prioritizes your app's success. So let's actualize your app's full potential - contact us today! Thanks!
$130 USD trong 2 ngày
6,4
6,4

Hello, As a seasoned problem solver and bug tracker, I'm confident that my skills in mobile app development and my ability to debug and improve existing code can help you resolve those pesky issues in your mobile apps. With extensive experience building mobile apps for iOS (Swift/Objective-C), Android (Kotlin/Java), as well as using cross-platform frameworks like Flutter, I'm familiar with the tools necessary for this specific task, such as Xcode, Android Studio, Firebase Crashlytics, and others. Moreover, my strong communication skills will ensure that I provide you with clear progress updates throughout the process and comprehensive explanations of what was fixed and how it was resolved. Also, I have hands-on experience in the submission process to both App Store and Google Play, which could be a bonus for you. My reputation in delivering scalable applications along with my familiarity with key debugging tools makes me the perfect candidate for this project. So if you're looking for someone who is capable of not only fixing bugs but also optimizing performance and user experience in existing mobile apps, look no further. I am available to start ASAP and eagerly look forward to partnering with you on this crucial maintenance task. Thank you for considering me. Thanks!
$155 USD trong 1 ngày
6,4
6,4

⭐⭐⭐⭐⭐ Fix Bugs in Your Mobile Apps for Better Performance and Usability ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and see you are looking for an experienced mobile app developer. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects focusing on bug fixing and troubleshooting. I will efficiently resolve critical issues that affect your app's performance and usability. ➡️ Why Me? I can easily fix your existing mobile app bugs as I have 5 years of experience in mobile app development, specializing in troubleshooting, bug resolution, and enhancing user experience. My expertise includes working with iOS and Android platforms, ensuring a smooth process for your project. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. I look forward to discussing this with you in our chat. ➡️ Skills & Experience: ✅ iOS Development (Swift) ✅ Android Development (Kotlin) ✅ Cross-Platform (Flutter, React Native) ✅ Bug Fixing ✅ UI/UX Troubleshooting ✅ API Integration ✅ Crash Analysis ✅ Debugging Tools (Xcode, Android Studio) ✅ Performance Optimization ✅ Testing on Real Devices ✅ Communication Skills ✅ App Store Submission (Bonus) Waiting for your response! Best Regards, Zohaib
$150 USD trong 2 ngày
6,3
6,3

Hello There!!! ★★★★ ( Mobile App Bug Fixes & Troubleshooting ) ★★★★ I understand you need an experienced developer to fix targeted bugs and troubleshoot issues in your existing mobile apps. The focus is on resolving crashes, UI glitches, API issues, and small logic problems without changing the core structure of the app. ⚜ Fix crashes, freezes, and error messages ⚜ Resolve UI layout issues and unresponsive buttons ⚜ Troubleshoot login/authentication problems ⚜ Debug failing API calls and data loading issues ⚜ Adjust notification behavior or feature logic ⚜ Identify causes of App Store or Play Store rejections ⚜ Test apps on real devices and emulators I have solid experiance working with existing codebases in iOS, Android, Flutter and React Native apps. I enjoy debugging complex issues and making apps stable and smooth again. My approach is reviewing crash logs, using tools like Xcode, Android Studio and Firebase Crashlytics, then testing fixes on multiple devices before pushing updates. I’m available to start ASAP and happy to review the issues with you. Warm Regards, Farhin B.
$110 USD trong 7 ngày
6,6
6,6

Hi, We’ve developed multiple mobile apps with a focus on performance and usability, and we’ve worked extensively with existing codebases to resolve critical bugs. We understand that even small issues can significantly impact user experience, and we’re committed to addressing them promptly. We can handle both iOS and Android apps, as we have strong expertise in Swift, Kotlin, and cross-platform frameworks like Flutter and React Native. We also have dedicated QA resources to ensure that fixes don’t introduce new issues. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best regards, Adil
$170,50 USD trong 7 ngày
5,9
5,9

Hi, I am an experienced mobile app developer with a strong background in troubleshooting and fixing issues across iOS, Android, and cross-platform frameworks like React Native and Flutter. I specialize in working with existing codebases to quickly resolve crashes, UI glitches, API failures, and minor feature bugs without introducing new issues. I can address your reported problems including app crashes, layout inconsistencies, login/authentication issues, notification behavior adjustments, form validation fixes, and ensure compatibility across devices. I will test thoroughly on simulators and real devices and provide clear explanations of all fixes applied. I am available to start immediately and can work efficiently to resolve these critical issues while maintaining code stability and performance. Best, Justin
$140 USD trong 7 ngày
6,2
6,2

Even minor bugs in mobile applications can cascade into severe user experience degradation and potential revenue loss if left unattended. Your requirement to swiftly identify and resolve targeted issues within existing iOS and Android codebases, using Swift, Kotlin, or cross-platform frameworks, precisely aligns with the complexities that demand deep platform-specific expertise. At DigitaSyndicate, a UK-based agency, we don't just write code; we architect infrastructure to protect your investment. Our local accountability ensures consistent communication and a rigorous debugging process leveraging tools like Xcode, Android Studio, and Firebase Crashlytics, safeguarding against overlooked regressions. Have you audited how concurrent bug fixes might interact with your app’s authentication and API call workflows to prevent emergent logic conflicts? Casper M. DigitaSyndicate
$200 USD trong 14 ngày
5,5
5,5

Hi, there, With over 5 years of experience in mobile app development, I specialize in iOS, Android, and cross-platform apps. I have a proven track record in swiftly addressing bugs and enhancing app performance. ✅ I will start by meticulously identifying and resolving crashes, freezes, and UI glitches. ✅ Next, I will focus on troubleshooting login/authentication issues, failing API calls, and minor feature adjustments. ✅ After that, I will delve into debugging, testing, and ensuring store compliance. ✅ Lastly, I will optimize the app's performance and enhance its user interface to meet the highest standards. Looking forward to collaborating with you to resolve these critical issues promptly. Best Regards. Brayan
$200 USD trong 3 ngày
5,5
5,5

Hi there,Good morning I am Talha. I have read you project details i saw you need help with React Native, Mobile App Development, Android App Development, API Integration, Model Testing & Optimization, UI / User Interface, API Development, Java and iOS Development I am pleased to present my proposal, highlighting our extensive experience and proven track record in delivering exceptional results. Our portfolio of success will showcase past projects that demonstrate our ability to meet and exceed client expectations. Glowing testimonials from satisfied clients will attest to our professionalism, dedication, and the quality of our work Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan
$30 USD trong 11 ngày
5,7
5,7

Hi, I’m an experienced mobile app developer with 7+ years working with Android (Kotlin/Java), iOS, and Flutter, and I specialize in debugging existing apps, fixing crashes, UI issues, API failures, and store rejection problems. I can quickly analyze your codebase, resolve the bugs efficiently, and provide clear reports of what was fixed. I’m available to start immediately. Could you please share how many bugs are currently identified and whether the iOS and Android apps use the same codebase or separate projects?
$140 USD trong 7 ngày
5,5
5,5

Bug Fixes or Minor Troubleshooting in Existing Mobile Apps (iOS, Android, Cross-Platform) I’m a full-stack software engineer with expertise in React, Node.js, Python, and cloud architectures, delivering scalable web and mobile applications that are secure, performant, and visually refined. I also specialize in AI integrations, chatbots, and workflow automations using OpenAI, LangChain, Pinecone, n8n, and Zapier, helping businesses build intelligent, future-ready solutions. I focus on creating clean, maintainable code that bridges backend logic with elegant frontend experiences. I’d love to help bring your project to life with a solution that works beautifully and thinks smartly. To review my samples and achievements, please visit:https://www.freelancer.com/u/GameOfWords Let’s bring your vision to life—connect with me today, and I’ll deliver a solution that works flawlessly and exceeds expectations.
$180 USD trong 3 ngày
5,4
5,4

I specialize in exactly this kind of targeted bug-fixing work across iOS (Swift/Objective-C), Android (Kotlin/Java), and React Native codebases, and I'm available to start immediately. My approach is systematic: I'll reproduce each issue in a simulator first, then use platform-specific debugging tools—Xcode Instruments, Android Profiler, and React Native Debugger—to trace crashes, UI glitches, and failing API calls to their root cause before implementing minimal, low-risk fixes that won't introduce regressions. I've resolved store rejection issues, authentication bugs, and layout inconsistencies across dozens of production apps, always testing on real devices before delivery. I'm comfortable working within existing codebases and can quickly ramp up on your project's architecture to begin resolving issues efficiently.
$30 USD trong 1 ngày
5,3
5,3

Hi, I can help quickly troubleshoot and fix the bugs in your existing mobile apps. I have experience with iOS (Swift/Objective-C), Android (Kotlin/Java), and cross-platform apps (Flutter/React Native), and I’m comfortable working directly within existing codebases. I can resolve crashes, UI glitches, login/API issues, notification adjustments, and other small but critical bugs, testing on both real devices and simulators. I’ll provide clear explanations of each fix so you can understand the changes. I’m available to start ASAP and can work efficiently to get your apps stable and ready for store updates.
$155 USD trong 1 ngày
5,3
5,3

Hi there, I will dive into your existing mobile apps, identify the root causes of crashes, UI glitches, failing API calls, and login issues, and deliver tested fixes without introducing side effects. My team works across iOS (Swift/Objective-C), Android (Kotlin/Java), Flutter, and React Native, so regardless of your tech stack, we will get these resolved quickly. One thing I typically do before touching any code is run a full Crashlytics and log audit to prioritize bugs by frequency and severity. This ensures the highest-impact issues get fixed first and nothing critical gets overlooked during the process. Questions: 1) What framework or language are the apps built in, and do we have access to the full source code and relevant credentials? 2) Are any of these bugs currently causing App Store or Google Play rejection that need urgent attention? Ready to start whenever you are. Faizan
$90 USD trong 5 ngày
5,3
5,3

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